18197389418544 has 360 divisors, whose sum is σ = 61539198739200. Its totient is φ = 5190541679232.

The previous prime is 18197389418501. The next prime is 18197389418557. The reversal of 18197389418544 is 44581498379181.

18197389418544 is a `hidden beast` number, since 1 + 8 + 1 + 9 + 7 + 38 + 9 + 41 + 8 + 544 = 666.

It is a super-2 number, since 2×18197389418544² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 114036957 + ... + 114196419.

It is an arithmetic number, because the mean of its divisors is an integer number (170942218720).

Almost surely, 2^{18197389418544} is an apocalyptic number.

18197389418544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18197389418544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30769599369600).

18197389418544 is an abundant number, since it is smaller than the sum of its proper divisors (43341809320656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18197389418544 is a wasteful number, since it uses less digits than its factorization.

18197389418544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160099 (or 160074 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 72.

The spelling of 18197389418544 in words is "eighteen trillion, one hundred ninety-seven billion, three hundred eighty-nine million, four hundred eighteen thousand, five hundred forty-four".